[Device]: Logitech MX Ergo trackball (Unifying receiver)

[dannykorpan]

Pre-flight checklist

• I quit Logi Options+ before testing.
• I searched existing issues for my device.

Device model

Logitech MX Ergo trackball (the original, not the MX Ergo S / Ergo M575)

Connection

Unifying receiver

What's the problem?

Device is not detected at all

openlogi list output

No output since: https://github.com/AprilNEA/OpenLogi/pull/362

openlogi diag features output

No output since: https://github.com/AprilNEA/OpenLogi/pull/362

Details

What I'm asking for

Support for the MX Ergo trackball. It is a HID++ device on a Unifying
receiver, so I'd expect at least button remapping, DPI control, and
per-app profiles to be feasible — SmartShift does not apply (no
MagSpeed wheel), but the trackball has a dedicated precision-mode
button and two thumb buttons (Back/Forward) that would be great to
remap.

Current behavior

<Describe what actually happens, e.g.:

• openlogi list output with the receiver plugged in and the trackball
  switched on (does the device show up at all? with which codename/model id?)
• Whether the GUI shows a device card (silhouette?) or nothing>

$ openlogi list
<paste output here>

HID++ diagnostics

$ openlogi diag features
<paste the full feature dump here — run with the MX Ergo as the active device>

OpenLogi Diagnostics

Additional notes

• Buttons: left, right, middle (wheel click), Back, Forward, precision-mode
  (DPI toggle), Easy-Switch (channel 1/2); scroll wheel with left/right tilt.
• Happy to test dev builds and provide further dumps or captures — I use
  this device daily over the Unifying receiver.

[linear-code]

OLG-129